Particulates are mobile, undissolved particles other than gas bubbles that are unintentionally present in an injectable drug product. Patient safety can be compromised by the amounts and types of particulates present in a drug product (1). They differ in nature (e.g., metal, glass, dust, fiber, rubber, polymer, mold, and degradant precipitates) and can be divided into three categories: intrinsic, inherent, and extrinsic particulates. Intrinsic (native) particles are derived from operation of a manufacturing process or its equipment, a product formulation,…